International Journal of Current Engineering and Technology E-ISSN 2277 – 4106, P-ISSN 2347 – 5161 ©2022 INPRESSCO ® , All Rights Reserved Available at http://inpressco.com/category/ijcet Research Article 369| International Journal of Current Engineering and Technology, Vol.12, No.4 (July/Aug 2022) Numerical Analysis of Vertical Pile Subjected to an Inclined Eccentric Load Fathi M. Abdrabbo † , Khaled E. Gaaver ‡ and Musab M. Eldooma ϯ †, ‡ Structural engineering department, Faculty of Engineering, Alexandria University, Egypt. ϯ Civil engineering department, Faculty of Engineering science, University of Nyala, Sudan. Received 18 July 2022, Accepted 10 Aug 2022, Available online 15 Aug 2022, Vol.12, No.4 (July/Aug 2022) Abstract Contradictory behavior of vertical pile subjected to inclined load was found in literature, so the current research was devoted to investigates the behavior of single vertical steel hollow pipe pile embedded in sand subjected to compressive inclined eccentric load through MIDAS GTS/NX 2019 FEM package. 3D numerical analysis simulating the pile-soil system have been carried out. The effects of the loading inclination angle and the pile length and diameter on the performance of the pile were investigated. Inclined load carrying capacity and pile stiffness as well as lateral deformation profiles along the pile were presented. The pile head displacement and pile stiffness are significantly affected by loading inclination angle. It was observed that, P-Y curves of the pile-soil system are independent of loading inclination angle α. also the pile length and diameter are markedly affecting the behavior of the pile. Keywords: Deep foundation, Inclined load, Piles, Pile deformations. 1. Introduction Many structures supported on piles are subjected to inclined compressive loads (R) such as electrical transmission towers, wind energy converter towers, and offshore structures. Due to the complex cases of the applied loading conditions on such structures, the supporting pile foundation should satisfy the safety and serviceability requirement as well. Most often the axial loads on piles supporting a structure are predominant. But in special cases like piles supporting offshore wind energy converter towers, the vertical load is minor compared by lateral load as pointed out by Zang et al. [1]. The study of vertical pile subjected to inclined loading (R) was investigated during 70s of the last century on the basis of experimental results from loading tests performed on small-scale piles, Meyerhof and his co-researches[2–4]. While theoretical analyses for assessing the ultimate bearing capacity (Ru) of a vertical pile subjected to an inclined load were proposed by Meyerhof and Ranjan [5]. In case of inclined loaded pile, current design practice involves independent analysis of vertical and lateral pile capacities and does not consider the interactions of vertical and horizontal load components (Rv and Rh). *Corresponding authors ORCID ID: 0000-0000-0000-0000 DOI: https://doi.org/10.14741/ijcet/v.12.4.8 Therefore, to predict the load-displacement response of a vertical pile under inclined load, it is assumed that the lateral displacement (Uh) of the pile head is independent of the vertical component of the inclined load (Rv). Similarly, while estimating the ultimate lateral resistance (Ruh), it is considered that the vertical load component (Rv) of the inclined load does not influence the ultimate lateral resistance of the pile (Ruh) [6]. However, Analytical investigations carried out by Davisson and Robinson [7], Ramasamy, [8], and Goryunov [9] revealed that, the lateral deflection of a pile due lateral load increases with the combination of vertical loads. But experimental investigation carried out by Pise [10], Sarochan and Bykov [11] and Jain et al. [12], as well as field investigations conducted by Bartolomey [13] and Zhukov and Balov [14], revealed that a decrease in lateral deflection with the combination of vertical load. Anagnostopoulos, and Georgiadis [15] attributed this contrary in pile response under inclined load to the procedure adopted for pile-soil modelling. Flexible reinforced concrete piles subjected to inclined load at the pile head can experience a flexural or an axial response depending upon load inclination angle (α), conte et al. [16]. Also, the bearing capacity of a pile (Ru)under inclined load is highly dependent on the load inclination angle (α) and the structural properties of the pile material [16]. The combined loading (Rv) and (Rh) Significantly increases the lateral
Numerical Analysis of Vertical Pile Subjected to an Inclined Eccentric Load
Jul 01, 2023
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